ST_GeometryType 接受 ST_Geometry 对象并以字符串形式返回它的几何图形类型。
语法
db2gse.ST_GeometryType (g db2gse.ST_Geometry)
返回类型
Varchar(4000)
示例
GEOMETRYTYPE_TEST 表包含 G1 几何图形列。
CREATE TABLE GEOMETRYTYPE_TEST(g1 db2gse.ST_Geometry)
下列 INSERT 语句将每个几何图形子类插入 G1 列。
INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('point (10.02 20.01)', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES (db2gse.ST_GeometryFromText('linestring (10.01 20.01, 10.01 30.01, 10.01 40.01)', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_Geometrytype_test values(db2gse.ST_GeomFromText('polygon ((10.02 20.01,11.92 35.64,25.02 34.15,19.15 33.94, 10.02 20.01))', db2gse.coordref()..srid(0)))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('multipoint (10.02 20.01,10.32 23.98,11.92 25.64)', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('multilinestring ((10.02 20.01,10.32 23.98, 11.92 25.64), (9.55 23.75,15.36 30.11))', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('multipolygon (((10.02 20.01,11.92 35.64,25.02 34.15, 19.15 33.94,10.02 20.01)), ((51.71 21.73,73.36 27.04,71.52 32.87, 52.43 31.90,51.71 21.73)))', db2gse.coordref()..srid(0)))
下列 SELECT 语句列示 G1 几何图形列中存储的每个子类的几何图形类型。
SELECT db2gse.ST_GeometryType(g1) "Geometry type" FROM GEOMETRYTYPE_TEST
返回下列结果集。
Geometry type -------------------------------- ST_Point ST_LineString ST_Polygon ST_MultiPoint ST_MultiLineString ST_MultiPolygon 6 record(s) selected.